I think its nice that you can discuss relationship issues with your nephew.
As to people saying they can't find anyone worthy of you, I get that too. I also get people telling me that every man I show interest in isn't good enough for me. I don't really know what all of that means.
So that leads me to wonder what that says about me, men in general today and the man who fucked up his life with me?
I think it says that so many people today have their priorities so far out of whack that it makes it more difficult to find a good match.
Sometimes I’ll read about a WS and an AP, no character, respect, responsibility, compassion, yet they think they’ve found the catch of the century because they have some form of currency and corresponding body parts. “All you need is love.”
Your nephew is young still, and so are you for that matter. It might take a bit longer to find someone worthwhile, but there are still great people out there and when you find each other you'll appreciate it.